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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8e650045a6a41db9a6e28161f2bfbf817371df31058b649098b0ec0fd2cd0925' 
  AND token = 'O5jb5DfbEKC6WIfcAN8CUNEKFJYeyAXOHC0bL9+/IcU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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