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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f641f2ac412effa62a8f651d679a0e72d7f4051d80a2269fe54fb5d49000caa0' 
  AND token = 'o5p4Rwad0gfrUJ9hhtl0ZabfNU0CzD6WwK6u2tuUW+Y=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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