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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'b06aa9553cf87b01c71858ae36d89c3caff9a0a5a498c2ac0b51612759d20383' 
  AND token = 'W8f54c9Y7M8Ri0twKyHWoquTVjoany29GL60QkUH0Hk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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