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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c1325f5f6f751bb5a610539f7db195ad5956ae29039b8cbc70b9939d62c7b8cd' 
  AND token = '713nIlpHbLdO792nNLDcLEyQYfD3zE4ZS3s/z/D7xrk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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