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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'afac82927bda0bbf69b93b691de3fef113c23bf39f550b6ec1d2a9a73631d5f6' 
  AND token = 'tzP6TaSFWUM2/EyI0al95m9vxsh7ac8HhtqYc3v9i4I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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