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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '9ec356e26093971912ed2f713e3fc169dbafff0aca1afa4c13909cd770e5c4e5' 
  AND token = 'frqzk8W7AIvnOWzD3PdldZZ/LpFS+8Hqp9uLYwtFRX0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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