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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'f5f420eec714cf19d1d81af6b938e675e34181dcc3f01730e4c1626134005b25' 
  AND token = 'UgZyR9jfu8o/Cnoy7qdcpwLEnASEn1Tl1vnYspXFDEQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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