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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c1aba7a1c871666daec0fc75aef102564614c7dd55b63d2d86a2bcd994ecc788' 
  AND token = '1hK+WfkQ5lUIV292H6RRPWxPCTl0QwyQgXXC02g9X90=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00053

JSON explain

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