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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '548a7ea01596a79ce86a1aab1b707e6e7a0a0af60542edcb819d2c5ae276fe16' 
  AND token = 'AlOP16/0X18BMNESj2GOCM/F3q5wXGeQojuWA8Mx5PA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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