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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0060da1753b77ee3a4b79a524837c2138a8513e231273c2254214179c5e1d159' 
  AND token = '7XbAUybYGASnTaMX0R3Ae+RgdC/rZp8uh6f4DBUx5sA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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