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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '7799fb3d01d02134bc4af41db14b0430113a6432625cd9c2e618771572c9ce80' 
  AND token = 'jMCbhvBhY2AFCkVj1ru0wb1iYeuVoHS0DYpmlSOiJcw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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