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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '964a5ce591f1067d672cfe3870c930f46f410716f4fe23d578becd0d65fb6961' 
  AND token = '6n5mk9oEkVqCD+ARWqf66jNc29fBQlJDR+KHc6UzXSc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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