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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '0a10fa9d679eaf5bb89540e9d1f30abb3ecb6ef4e23dc4efe8b3f6b85ecc588a' 
  AND token = '2Pc9XhC6yykaXEl/XY2ym06yemW/vJyI/PQCzX0nQfk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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