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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '69906803749e19f37aa5518cfec1bab01813ffb7a9d81d1de2ad463bc9c2a3a8' 
  AND token = 'TDv8pmF48mm7FX+FftlbA/ofKMd7LYiJhbV/nDQ7fiU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00049

JSON explain

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