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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '2c148d31305dda16e63225ee548b1cbd59d1ec3271fedcbda7ed1aabb336f91d' 
  AND token = '2Yvri5XmKw5htzsEA5UcAcEmQ+AUtFWVdePyA1CpK9I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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