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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '4dc0f9f5316e5db115a261bf1d4e399f50005fa8db4178813cfe79d6f1c8e0ca' 
  AND token = '7rnOBYsvtNWu9D8o515t6yNis/TFeHaVnsrF046ZNog=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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