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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '0cda0b28b11150820de204ad24e2b5a2cdbd6ef46a6ea2c6c936a9ae9015aa0f' 
  AND token = 'qbXJaGAQsgkRnR5cUtKPL2DgsbKIR0lIwfndUdaP5Hc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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