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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '5caa84a529e0792f7c12b42b766ca3cbb1adc1e93fffa68dcc942c5dc66f5775' 
  AND token = 'fGQBoPThLTV2kn8e4n8QwAdIGDW5LQfl1JdXChzjYfE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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