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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '4ef6f9298b349451c6638c9fa735b1fb97998aaa052eda920c769683d28a13c2' 
  AND token = 'Z2a3/RlMkrQ9stvnSqydbaTpg77zS96d6zwWxJW2Vzw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

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