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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '8beba53ae2dcb520b32d03bbf78d6021c2268eace6575aab77efe94a7630f321' 
  AND token = 'Q2p5uJ85npFVkNc3Vh/lpNuEyhfoWaQY9u7VlrOMoeA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

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