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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '7b3008dfeae0ec35f836c1c1e8049cb09609b2d25e2e8601a73e9cf67763a658' 
  AND token = 'X7X57J9V8u7jpaP2Pd22JszpfU581M7i5ZXtZRTxHNI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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