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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fdea3d478406417bd63adc7f34c3b08c2a62a6ecb355b67c87e1646add0b6fe1' 
  AND token = 'CYRdecByJuVeJJv3JvMJV5Tlylskseq4LxTDDo4IaDY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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