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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '241ba34a8cb6ba5f22a752ef116767a1f77bc8d6ad8a592bfeea3a9a834b580e' 
  AND token = 'vNr+rMChTGbf34cCjVWgyCdu7sfa5XZEFKtfy9J8A+s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}