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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '83fdd8e1789dca939e07217820abcdc8b818d37de3648819ca6e7ee95b370223' 
  AND token = 'f/6CGGnLgNtkN3/1c4V+a0pERvpc30Bd5I565Z4v6Lg=' 
  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"
    }
  }
}