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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7a2abc6da3f45e5d9f79a3aa70386d0b09bbec4ad6cbfb3318a03236f80697eb' 
  AND token = '7IxZjZAJ19p+FpB/j0W0DNxovuPPAfHEiQQCW9mxjZQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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