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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'eaae17930c5a63cc7ea6f0498e7530aed1bec4cc31e938e5d3e7a2887453cc7e' 
  AND token = 'm3prFHKItKMtJvpRHGqC+8GWaX/FD24G4sQTOWwvpy4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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