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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '0f95c68972ac9b27ad08820ee12a836a38f7b134066d94ab74d3d93ea4f7e527' 
  AND token = 'gqFJR974AHCeul9+ygbQ6SXQgYODeasYZad2Ihi2SBs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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