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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'ca81b1422c4edecb9721fc35731cb1ee2872984dc702610a17ab2478193d89ea' 
  AND token = 'efYaWiVQvyI6bW2s1mM9M2vSXfAh611QCx5/XU0Cl4E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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