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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '58466885a38c955b23aa5b86a75c9ccaf3e42b0c0d390b263a1f61cdaab80fc7' 
  AND token = 'FIUNslcsG5kDK46gRK0J2BGo2qh/HKD1KEnVnMuLUvA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}