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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '20dae0b5b0a70a9aaa8c1743fc74b3273a952dfb01f2c23b9056b07e46181182' 
  AND token = 'iQWKdYGBtr3T1tcPNh7V0SnGtKfoqCb8h/eMwcRIZPc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00064

JSON explain

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