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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '97cc7eab5d64afd6c39391bca069804e3dfc574e82a14495dd8bef2c8fd88a73' 
  AND token = 'DTo+nelku8fYYq3PF/a8y4bz9mx/NxybcLDUnwH0YtE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00050

JSON explain

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