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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '80ab598fb6c88b3d9190420f70d935c42c8875219ddd1d5f9d8befc155a0a90a' 
  AND token = 'vvoOE4tlqv9/GloSfawn35qZGmnJh8MUN9u4A3+lCFI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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