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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '0df7906e0d319c90b5dbd625114168aa3f7877c1a75909cffcd00a677c45773f' 
  AND token = 'R7JCg3LC6iojiVTh4Va+mSEmcHkfE5GHE+lSOn8f+Gg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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