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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'd8a0abc46c9ef8c13f844821f61b3d664c26eb7b79ade01b19c51fbf7587a562' 
  AND token = 'YaO6GsdtgkA0PpNxG9zxzT2RUfQ3tUGqvFU1j11kG30=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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